CN111070664B - 3D printing slice generation method, device, equipment and storage medium - Google Patents

3D printing slice generation method, device, equipment and storage medium Download PDF

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CN111070664B
CN111070664B CN201911405203.8A CN201911405203A CN111070664B CN 111070664 B CN111070664 B CN 111070664B CN 201911405203 A CN201911405203 A CN 201911405203A CN 111070664 B CN111070664 B CN 111070664B
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slice
voxel
dimensional reconstruction
color
reconstruction model
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CN111070664A (en
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刘雯卿
万俊
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Shanghai United Imaging Healthcare Co Ltd
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Shanghai United Imaging Healthcare Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing

Abstract

The embodiment of the invention discloses a 3D printing slice generation method, a device, equipment and a storage medium, wherein the 3D printing slice generation method comprises the following steps: receiving a three-dimensional reconstruction model of a target object to be printed; slicing the three-dimensional reconstruction model to obtain at least one initial slice; determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, and rendering the initial slice according to the second optical characteristic to generate a target slice; the first optical characteristic corresponds to a visual presentation effect of a first part in the target object, and the first part is a part corresponding to the first voxel in the target object. The technical scheme of the embodiment of the invention simplifies the process of obtaining the 3D printing slice and improves the precision of the printing slice.

Description

3D printing slice generation method, device, equipment and storage medium
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a 3D printing slice generation method, a device, equipment and a storage medium.
Background
With the development of 3D printing technology, the application of 3D printing models is also more and more widespread. Taking 3D printing applied to the medical field as an example: the anatomical model that 3D printed can assist the doctor to have more clear understanding to dissecting before complicated operation, also can assist the doctor to carry out the rehearsal before the art, and the simulation operation process, and then improves the operation success rate.
The traditional flow for obtaining the slice of the anatomical model comprises complex processes of data acquisition, segmentation modeling, mesh conversion, mesh smoothing and simplification and the like. The process is complex, and manual operation with large workload is needed; in addition, the precision of the printing model is influenced by processes such as an automatic/semi-automatic segmentation algorithm, a voxel grid-to-voxel process, grid smoothing and simplification and the like, and certain distortion exists.
Disclosure of Invention
The invention provides a 3D printing slice generation method, a device, equipment and a storage medium, which simplify the process of obtaining 3D printing slices and improve the precision of printing slices.
In a first aspect, an embodiment of the present invention provides a 3D print slice generation method, where the method includes:
receiving a three-dimensional reconstruction model of a target object to be printed;
slicing the three-dimensional reconstruction model to obtain at least one initial slice;
determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, and rendering the initial slice according to the second optical characteristic to generate a target slice;
wherein the first optical characteristic corresponds to a visual presentation of a first location in the target object, the first location being a location in the target object that corresponds to the first voxel.
In a second aspect, an embodiment of the present invention further provides a 3D print slice generating apparatus, where the apparatus includes:
the three-dimensional reconstruction model printing module is used for receiving a three-dimensional reconstruction model of a target object to be printed;
the initial slice generating module is used for slicing the three-dimensional reconstruction model to obtain at least one initial slice;
a target slice generation module, configured to determine a second optical feature corresponding to at least one second voxel in the initial slice according to a first optical feature corresponding to at least one first voxel in the three-dimensional reconstruction model, and render the initial slice according to the second optical feature to generate a target slice;
wherein the first optical characteristic corresponds to a visual presentation of a first location in the target object, the first location being a location in the target object that corresponds to the first voxel.
In a third aspect, an embodiment of the present invention further provides a 3D print slice generating apparatus, where the apparatus includes:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method of 3D print slice generation as in any embodiment of the invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the 3D print slice generating method according to any one of the embodiments of the present invention.
The embodiment of the invention provides a 3D printing slice generation method, a device, equipment and a storage medium, wherein a three-dimensional reconstruction model of a target object to be printed is received, the three-dimensional reconstruction model is sliced to obtain at least one initial slice, a second optical characteristic corresponding to at least one second voxel in the initial slice is determined according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, the initial slice is rendered according to the second optical characteristic, and the target slice is generated, wherein the first optical characteristic corresponds to a visual presentation effect of a first part in the target object, the first part is a part corresponding to the first voxel in the target object, the process of obtaining the 3D printing slice is simplified, and the precision of printing the slice is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a 3D print slice generation method according to a first embodiment of the present invention;
fig. 2 is a flowchart of a 3D print slice generation method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a 3D printing slice generation apparatus according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a 3D print slice generating apparatus in a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a 3D print slice generating method according to an embodiment of the present invention, where the embodiment is applicable to a case where 3D printing is required, and the method may be executed by a 3D print slice generating apparatus, and may be specifically implemented by software and/or hardware in the 3D print slice generating apparatus. As shown in fig. 1, the method of this embodiment specifically includes:
and S110, receiving a three-dimensional reconstruction model of the target object to be printed.
The target object to be printed may be an anatomical tissue or organ of a human body, or may be another object other than a human body, for example, an anatomical tissue or organ of an animal, an automobile, a building, or the like. Accordingly, the three-dimensional reconstruction model may preferably be a three-dimensional reconstruction model of an anatomical tissue or organ of a human body, or may be a three-dimensional reconstruction model of an automobile, a building, or the like.
Taking the anatomical tissue or organ of the human body as an example, the three-dimensional reconstruction algorithm may be used to perform three-dimensional reconstruction on the anatomical tissue or organ of the human body by using pre-acquired DICOM (Digital Imaging and Communications in Medicine) volume data of the anatomical tissue or organ of the human body, so as to obtain a corresponding three-dimensional reconstruction model.
It is understood that the proportional relationship between the size of the three-dimensional reconstruction model and the actual size of the target object to be printed may be set according to actual needs, and is not specifically limited herein. Illustratively, the three-dimensional reconstruction model is a three-dimensional reconstruction model of an anatomical tissue or organ of a human body, which is printed for the purpose of assisting a physician in a preoperative exercise, and at this time, a ratio between the size of the three-dimensional reconstruction model and the actual size of the corresponding anatomical tissue or organ of the human body should preferably be set to 1.
And S120, slicing the three-dimensional reconstruction model to obtain at least one initial slice.
Since the 3D printing technology is a technology for constructing an object by printing layer by layer using an adhesive material such as powdered metal or plastic on the basis of a digital model file, it is preferable that a three-dimensional reconstructed model be subjected to a layering process, that is, a slicing process for the three-dimensional reconstructed model, before performing 3D printing. After slicing the three-dimensional reconstruction model, at least one initial slice can be obtained, wherein one slice is a layer, and the thickness of the slice is the layer height. The thickness of the slice may be set according to actual parameters of the 3D printer, and is not specifically limited herein.
It is understood that the above-mentioned process of slicing the three-dimensional reconstruction model is a process of converting the three-dimensional reconstruction model into a printer space. Specifically, the method comprises the following steps: the three-dimensional reconstructed model may be converted into at least one initial slice in printer space according to a correspondence between a voxel size of the three-dimensional reconstructed model and a voxel size in printer space. The voxel size in the printer space is not determined, and may be determined according to different printers. In particular, the voxel size in printer space may include the thickness of a voxel in the printer Z-axis and the dimensions (inches or microns, etc.) in the printer X-axis and Y-axis.
S130, determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, and rendering the initial slice according to the second optical characteristic to generate a target slice; the first optical characteristic corresponds to a visual presentation effect of a first part in the target object, and the first part is a part corresponding to the first voxel in the target object.
The visual presentation effect may be, for example, a color, a transparency, a shade, and an object surface smoothness presented by the target object.
In this embodiment, after slicing the three-dimensional reconstruction model, preferably, the optical characteristics corresponding to the three-dimensional reconstruction model may be further converted into optical characteristics in a printer space, and specifically, the optical characteristics corresponding to the second voxel in each initial slice may be determined according to the optical characteristics corresponding to the first voxel in the three-dimensional reconstruction model, and each initial slice is rendered based on the optical characteristics corresponding to the second voxel, so as to obtain a target slice having the optical characteristics in the printer space.
In the 3D print slice generation method provided by this embodiment, a three-dimensional reconstruction model of a target object to be printed is received, the three-dimensional reconstruction model is sliced to obtain at least one initial slice, a second optical feature corresponding to at least one second voxel in the initial slice is determined according to a first optical feature corresponding to at least one first voxel in the three-dimensional reconstruction model, and the initial slice is rendered according to the second optical feature to generate the target slice, where the first optical feature corresponds to a visual presentation effect of a first portion in the target object, and the first portion is a portion corresponding to the first voxel in the target object, so that a process of obtaining the 3D print slice is simplified, and accuracy of printing the slice is improved.
On the basis of the foregoing embodiments, further slicing the three-dimensional reconstruction model to obtain at least one initial slice includes:
determining a first thickness of the initial slice in the Z-axis direction according to the printing precision of the target printer;
determining a first number of initial slices contained in the Z-axis direction according to the number of first voxels contained in the Z-axis direction of the three-dimensional reconstruction model, a second thickness of the first voxels in the Z-axis direction and the first thickness;
determining a second number of second voxels included in the initial slice in the X-axis direction and a third number of second voxels included in the initial slice in the Y-axis direction according to the number of first voxels included in the three-dimensional reconstruction model in the X-axis direction, a first length of the first voxels in the X-axis direction, a second length of the first voxels in the Y-axis direction, a third length of the second voxels in the X-axis direction and a fourth length of the second voxels in the Y-axis direction;
and slicing the three-dimensional reconstruction model according to the first number, the second number and the third number to obtain at least one initial slice.
Illustratively, if the printing accuracy of the target printer is 0.0135mm, the first thickness of the initial slice in the Z-axis is determined to be 0.0135 mm. If the number of first voxels included in the three-dimensional reconstruction model in the Z-axis direction is determined to be 206 and the second thickness of the first voxel in the Z-axis direction is determined to be 0.5mm, the first number of initial slices included in the Z-axis direction may be determined to be 206 × (0.5/0.0135) ═ 7630, that is, the number of initial slices in the Z-axis direction in the target printer space may be determined to be 7630, based on the number of first voxels 206, the second thickness of the first voxel in the Z-axis direction of 0.5mm, and the first thickness of the initial slices in the Z-axis direction of 0.0135 mm.
If it is determined that the three-dimensional reconstruction model includes 512 first voxels in the X-axis direction, 0.296875mm is a first voxel length in the X-axis direction, 512 first voxels in the Y-axis direction, 0.296875mm is a second voxel length in the Y-axis direction, 0.042333mm is a third voxel length in the X-axis direction, and 0.084667mm is a fourth voxel length in the Y-axis direction, it is possible to determine, based on the 512 number of first voxels included in the three-dimensional reconstruction model in the X-axis direction, the 0.296875mm first voxel length in the X-axis direction, the 512 number of first voxels included in the three-dimensional reconstruction model in the Y-axis direction, the 0.296875mm second voxels in the Y-axis direction, 0.042333mm second voxel length in the X-axis direction, and the 0.084667mm second voxel length in the Y-axis direction, it is determined that the second number of second voxels included in the initial slice in the X-axis direction is 512X (0.296875/0.042333) ═ 3951 and the third number of second voxels included in the initial slice in the Y-axis direction is 512X (0.296875/0.084667) ═ 1796.
The three-dimensional reconstructed model is sliced according to the first number 7630, the second number 3951 and the third number 1796, and 7630 initial slices with a cross-section resolution of 600 (pieces/foot) × 300 (pieces/foot) are obtained.
Further, before slicing the three-dimensional reconstruction model, the method further comprises:
according to a preset rule, a first external contour is established for the three-dimensional reconstruction model, and the three-dimensional reconstruction model after the first external contour is established is used as the three-dimensional reconstruction model;
usually, after the 3D printing is completed, there may be a partially printed model which cannot exist independently because the supporting points are not enough to support the body thereof, for example, the printed model may be obtained after printing with a three-dimensional reconstruction model of a blood vessel. Based on this, the present embodiment may create an outer contour (i.e., the first outer contour) for the three-dimensional reconstruction model to support the printing model with the outer contour. It will be appreciated that the shape of the first outer contour may be arbitrary, and its position relative to the outer contour of the three-dimensional reconstructed model may also be arbitrary, as long as it is capable of supporting the printed model.
Further, according to a preset rule, creating a first outer contour for the three-dimensional reconstruction model includes:
and extending the second outer contour of the three-dimensional reconstruction model outwards by a preset length threshold to obtain the first outer contour.
In this embodiment, the outer contour of the three-dimensional reconstruction model is referred to as a second outer contour, and preferably, each point on the second outer contour may be extended outward along a normal direction thereof by a preset length threshold to obtain the first outer contour.
Example two
Fig. 2 is a flowchart of a 3D print slice generation method according to a second embodiment of the present invention. On the basis of the foregoing embodiments, the determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model optionally includes: determining a second color and a second opacity corresponding to the corresponding second voxel by using a dithering algorithm according to the first color and the first opacity corresponding to the first voxel respectively; correspondingly, the rendering the initial slice according to the second optical characteristic includes: rendering the initial slice according to the second color and the second opacity to obtain a target slice with the second color and the second opacity. As shown in fig. 2, the method of this embodiment specifically includes:
s210, receiving a three-dimensional reconstruction model of the target object to be printed.
S220, slicing the three-dimensional reconstruction model to obtain at least one initial slice.
And S230, determining a second color and a second opacity corresponding to a corresponding second voxel by using a dithering algorithm according to the first color and the first opacity corresponding to the first voxel respectively.
In this embodiment, the optical features may preferably include a color and an opacity, wherein the first optical feature includes a first color and a first opacity and the second optical feature includes a second color and a second opacity. Since the first voxel corresponds to a plurality of second voxels, it is preferable that a dithering algorithm be used to convert a first color and a first opacity corresponding to a first voxel into a plurality of second colors and a plurality of second opacities corresponding to a plurality of second voxels corresponding to the first voxel.
And S240, rendering the initial slice according to the second color and the second opacity to obtain a target slice with the second color and the second opacity.
In the 3D print slice generation method provided in this embodiment, a three-dimensional reconstruction model of a target object to be printed is received, the three-dimensional reconstruction model is sliced to obtain at least one initial slice, a second color and a second opacity corresponding to a corresponding second voxel are determined by using a dithering algorithm according to a first color and a first opacity corresponding to a first voxel, and the initial slice is rendered according to the second color and the second opacity to obtain the target slice having the second color and the second opacity.
On the basis of the foregoing embodiments, further before determining, by using a dithering algorithm, a color and an opacity corresponding to a corresponding second voxel according to a color and an opacity corresponding to a first voxel, respectively, the method includes:
and determining the color and opacity corresponding to the first voxel according to a preset color and opacity mapping file, wherein the preset color and opacity mapping file is a corresponding relation file between the color and opacity corresponding to the first voxel and the first voxel.
Preferably, the preset color and opacity mapping file may be a preset color and opacity mapping table. Specifically, each first voxel corresponds to a color and an opacity.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a 3D print slice generating apparatus according to a third embodiment of the present invention. As shown in fig. 3, the apparatus of the present embodiment includes:
a three-dimensional reconstruction model printing module 310, configured to receive a three-dimensional reconstruction model of a target object to be printed;
an initial slice generating module 320, configured to slice the three-dimensional reconstruction model to obtain at least one initial slice;
a target slice generating module 330, configured to determine a second optical feature corresponding to at least one second voxel in the initial slice according to a first optical feature corresponding to at least one first voxel in the three-dimensional reconstruction model, and render the initial slice according to the second optical feature to generate a target slice;
the first optical characteristic corresponds to a visual presentation effect of a first part in the target object, and the first part is a part corresponding to the first voxel in the target object.
The 3D printing slice generating device provided in this embodiment receives a three-dimensional reconstruction model of a target object to be printed by using a three-dimensional reconstruction model printing module, slices the three-dimensional reconstruction model by using an initial slice generating module to obtain at least one initial slice, and determines a second optical feature corresponding to at least one second voxel in the initial slice according to a first optical feature corresponding to at least one first voxel in the three-dimensional reconstruction model by using the target slice generating module, and renders the initial slice according to the second optical feature to generate the target slice, where the first optical feature corresponds to a visual presentation effect of a first portion in the target object, and the first portion is a portion corresponding to the first voxel in the target object, thereby simplifying a process of obtaining the 3D printing slice and improving accuracy of printing the slice.
On the basis of the above technical solution, further, the target slice generating module 330 includes:
a second color and opacity determining unit, configured to determine, according to the first color and the first opacity corresponding to the first voxel, a second color and a second opacity corresponding to a corresponding second voxel by using a dithering algorithm;
and the target slice generating unit is used for rendering the initial slice according to the second color and the second opacity to obtain a target slice with the second color and the second opacity.
On the basis of the above technical solution, further, the target slice generating module 330 further includes:
and the second color and opacity determining unit is used for determining the color and opacity corresponding to the first voxel according to a preset color and opacity mapping file before determining the color and opacity corresponding to the corresponding second voxel by using a dithering algorithm according to the color and opacity corresponding to the first voxel respectively, wherein the preset color and opacity mapping file is a corresponding relation file between the color and opacity corresponding to the first voxel and the first voxel.
On the basis of the foregoing technical solution, further, the initial slice generating module 320 may specifically include:
a first thickness determination unit for determining a first thickness of the initial slice in the Z-axis direction according to the printing accuracy of the target printer;
a first number determination unit configured to determine a first number of initial slices included in the Z-axis direction, based on a number of first voxels included in the three-dimensional reconstruction model in the Z-axis direction, a second thickness of the first voxels in the Z-axis direction, and the first thickness;
a second number and third number determination unit configured to determine a second number of second voxels included in the initial slice in the X-axis direction and a third number of second voxels included in the initial slice in the Y-axis direction, based on the number of first voxels included in the three-dimensional reconstruction model in the X-axis direction, a first length of the first voxels in the X-axis direction, the number of first voxels included in the three-dimensional reconstruction model in the Y-axis direction, a second length of the first voxels in the Y-axis direction, a third length of the second voxels in the X-axis direction, and a fourth length of the second voxels in the Y-axis direction;
and the initial slice generating unit is used for slicing the three-dimensional reconstruction model according to the first number, the second number and the third number to obtain at least one initial slice.
On the basis of the above technical solution, further, the apparatus may further include:
the first external contour creating module is used for creating a first external contour for the three-dimensional reconstruction model according to a preset rule before slicing the three-dimensional reconstruction model and taking the three-dimensional reconstruction model after creating the first external contour as the three-dimensional reconstruction model;
on the basis of the above technical solution, further, the first external contour creation module may specifically be configured to:
and extending the second outer contour of the three-dimensional reconstruction model outwards by a preset length threshold to obtain the first outer contour.
The 3D printing slice generation device provided by the embodiment of the invention can execute the 3D printing slice generation method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a schematic structural diagram of a 3D print slice generating apparatus according to a fourth embodiment of the present invention. FIG. 4 illustrates a block diagram of an exemplary 3D print slice generation apparatus 412 suitable for use in implementing embodiments of the present invention. The 3D print slice generation apparatus 412 shown in fig. 4 is only an example, and should not bring any limitation to the function and the range of use of the embodiment of the present invention.
As shown in fig. 4, the 3D print slice generation apparatus 412 is embodied in the form of a general purpose computing device. The components of the 3D print slice generation apparatus 412 may include, but are not limited to: one or more processors 416, a memory 428, and a bus 418 that couples the various system components (including the memory 428 and the processors 416).
Bus 418 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
The 3D print slice generation apparatus 412 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by 3D print slice generation apparatus 412 and includes both volatile and nonvolatile media, removable and non-removable media.
Memory 428 can include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)430 and/or cache memory 432. The 3D print slice generation device 412 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage 434 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, and commonly referred to as a "hard drive"). Although not shown in FIG. 4, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 418 by one or more data media interfaces. Memory 428 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 440 having a set (at least one) of program modules 442 may be stored, for instance, in memory 428, such program modules 442 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. The program modules 442 generally perform the functions and/or methodologies of the described embodiments of the invention.
The 3D print slice generation device 412 may also communicate with one or more external devices 414 (e.g., keyboard, pointing device, display 424, etc., where the display 424 may be configurable or not as desired), one or more devices that enable a user to interact with the 3D print slice generation device 412, and/or any device (e.g., network card, modem, etc.) that enables the 3D print slice generation device 412 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 422. Also, the 3D print slice generation device 412 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) through the network adapter 420. As shown, network adapter 420 communicates with the other modules of 3D print slice generation apparatus 412 over bus 418. It should be appreciated that although not shown in fig. 4, other hardware and/or software modules may be used in conjunction with the 3D print slice generation apparatus 412, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage, among others.
The processor 416 executes various functional applications and data processing, for example, implementing a 3D print slice generation method provided by an embodiment of the present invention, by executing programs stored in the memory 428.
EXAMPLE five
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a 3D print slice generating method provided in an embodiment of the present invention, where the computer program includes:
receiving a three-dimensional reconstruction model of a target object to be printed;
slicing the three-dimensional reconstruction model to obtain at least one initial slice;
determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, and rendering the initial slice according to the second optical characteristic to generate a target slice;
the first optical characteristic corresponds to a visual presentation effect of a first part in the target object, and the first part is a part corresponding to the first voxel in the target object.
Of course, the computer-readable storage medium provided by the embodiments of the present invention, on which the computer program is stored, is not limited to performing the method operations described above, and may also perform related operations in the 3D print slice generation method based on the 3D print slice generation apparatus provided by any embodiments of the present invention.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A3D printing slice generation method is characterized by comprising the following steps:
receiving a three-dimensional reconstruction model of a target object to be printed;
slicing the three-dimensional reconstruction model to obtain at least one initial slice;
determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstruction model, and rendering the initial slice according to the second optical characteristic to generate a target slice;
wherein the first optical characteristic corresponds to a visual presentation of a first location in the target object, the first location being a location in the target object that corresponds to the first voxel.
2. The method according to claim 1, wherein the determining a second optical characteristic corresponding to at least one second voxel in the initial slice according to a first optical characteristic corresponding to at least one first voxel in the three-dimensional reconstructed model comprises:
determining a second color and a second opacity corresponding to the corresponding second voxel by using a dithering algorithm according to the first color and the first opacity corresponding to the first voxel respectively;
correspondingly, the rendering the initial slice according to the second optical characteristic includes:
rendering the initial slice according to the second color and the second opacity to obtain a target slice with the second color and the second opacity.
3. The method according to claim 2, wherein before determining the color and opacity corresponding to the corresponding second voxel according to the color and opacity corresponding to the first voxel respectively by using a dithering algorithm, the method comprises:
and determining the color and opacity corresponding to the first voxel according to a preset color and opacity mapping file, wherein the preset color and opacity mapping file is a corresponding relation file between the color and opacity corresponding to the first voxel and the first voxel.
4. The method according to any one of claims 1-3, wherein said slicing the three-dimensional reconstructed model to obtain at least one initial slice comprises:
determining a first thickness of the initial slice in the Z-axis direction according to the printing precision of a target printer;
determining a first number of the initial slices included in the Z-axis direction according to the number of the first voxels included in the three-dimensional reconstruction model in the Z-axis direction, a second thickness of the first voxels in the Z-axis direction and the first thickness;
determining a second number of the second voxels included in the initial slice in the X-axis direction and a third number of the second voxels included in the initial slice in the Y-axis direction according to the number of the first voxels included in the three-dimensional reconstructed model in the X-axis direction, a first length of the first voxels in the X-axis direction, a second length of the first voxels in the Y-axis direction, a third length of the second voxels in the X-axis direction, and a fourth length of the second voxels in the Y-axis direction;
and slicing the three-dimensional reconstruction model according to the first number, the second number and the third number to obtain at least one initial slice.
5. The method according to any one of claims 1-3, further comprising, prior to slicing the three-dimensional reconstructed model:
and according to a preset rule, creating a first external contour for the three-dimensional reconstruction model, and taking the three-dimensional reconstruction model after the first external contour is created as the three-dimensional reconstruction model.
6. The method of claim 5, wherein the creating a first outer contour for the three-dimensional reconstructed model according to a preset rule comprises:
and extending the second outer contour of the three-dimensional reconstruction model outwards by a preset length threshold to obtain a first outer contour.
7. A 3D print slice generation apparatus, comprising:
the three-dimensional reconstruction model printing module is used for receiving a three-dimensional reconstruction model of a target object to be printed;
the initial slice generating module is used for slicing the three-dimensional reconstruction model to obtain at least one initial slice;
a target slice generation module, configured to determine a second optical feature corresponding to at least one second voxel in the initial slice according to a first optical feature corresponding to at least one first voxel in the three-dimensional reconstruction model, and render the initial slice according to the second optical feature to generate a target slice;
wherein the first optical characteristic corresponds to a visual presentation of a first location in the target object, the first location being a location in the target object that corresponds to the first voxel.
8. The apparatus of claim 7, wherein the target slice generation module comprises:
a color and opacity determining unit, configured to determine, according to a first color and a first opacity corresponding to the first voxel, a second color and a second opacity corresponding to the corresponding second voxel by using a dithering algorithm;
and the target slice generating unit is used for rendering the initial slice according to the second color and the second opacity to obtain a target slice with the second color and the second opacity.
9. A 3D print slice generation apparatus, characterized in that the apparatus comprises:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the 3D print slice generation method of any of claims 1-6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a 3D print slice generation method according to any one of claims 1 to 6.
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